ASTRA: A Python Package for Cross-Instrument Stellar and Telluric Template Construction

TL;DR

ASTRA is a versatile Python package that standardizes access to high-resolution stellar spectra from multiple instruments, simplifying data analysis and calibration processes across different spectrographs.

Contribution

It introduces a modular, instrument-independent interface for working with diverse high-resolution stellar spectra, streamlining data handling and calibration.

Findings

Supports multiple spectrographs including ESPRESSO, HARPS, MAROON-X, and CARMENES

Provides unified access to fluxes, wavelengths, uncertainties, and metadata

Automates wavelength and flux calibration processes

Abstract

ASTRA is a Python package that provides a modular, instrument-independent interface for working with high-resolution stellar spectra. Designed to support data from multiple spectrographs, including ESPRESSO (Pepe et al., 2021), HARPS (Mayor et al., 2003; Pepe et al., 2002), MAROON-X (Seifahrt et al., 2022), and CARMENES (Quirrenbach et al., 2014). ASTRA offers a unified abstraction over their data formats, enabling consistent access to fluxes, wavelengths, uncertainties, and metadata across instruments. Furthermore, it applies the necessary wavelength and flux calibrations that are needed, as described by the official pipelines of each instrument.